Trace element distribution between phases of the D'Orbigny angrite

KURAT GERO,; MARIA EUGENIA VARELA; ZINNER ERNS,; HOPPE PETER,; NTAFLOS T,; NAZAROV M,

Houston NASA

Congreso; XXXV Lunar and Planetary Science Conference; 2004

Introduction: The shape, structure and texture of D’Orbigny and its mineral and bulk chemical compositions indicate a genesis under changing redox conditions, more akin to chondritic than to planetary differentiated rocks. Our data and observations [1, 2] are incompatible with an igneous origin for this rock as entertained by e.g., [3, 4]. Thus, D’Orbigny turned out to be the Rosetta Stone of angritic achondrites. Here we report on the results of trace element (TE) studies of major and minor phases, which support our previous conclusions.